<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<title>javaScript设计模式</title>
	</head>
	<body>
		<h3>
			<!-- <p>javascript设计模式</p>
			<p>javascript设计模式</p>
			<p>javascript设计模式</p>
			
			<hr />
			
			<button type="button" id="btn1"></button> -->
			
			<!-- <hr /> -->
			
			<div id="app"></div>
		</h3>
	</body>
</html>